Connector actuation mechanism

ABSTRACT

A mechanism for electrically connecting a first electronic component to a second electronic component includes an actuating member disposed in the first electronic component including a first connector half and an actuation screw having a head and a threaded end. The actuation screw is located in the first electronic component wherein rotation of the actuation screw urges the actuating member in a direction substantially perpendicular to an axis of the actuation screw thereby engaging the first connector half to a second connector half disposed in the second electronic component.

CROSS REFERENCE TO RELATED APPLICATION

This application is a division of U.S. patent application Ser. No.12/035,595, filed Feb. 22, 2008, the contents of which are incorporatedby reference herein in their entirety.

TRADEMARKS

IBM® is a registered trademark of International Business MachinesCorporation, Armonk, N.Y., U.S.A. Other names used herein may beregistered trademarks, trademarks or product names of InternationalBusiness Machines Corporation or other companies.

BACKGROUND OF THE INVENTION Field of the Invention

This invention relates to electronic components, and particularly toconnectors for electronic components.

Background

Increasing needs for power for electronic components, for example,system processing units has led to increased volt-ampere requirementsand an increase in the number of required power domains (or voltages)provided by power supplies (or Direct Current Adaptors) to the systemprocessing units. Resulting connectors between the power supply and thesystem processing unit have high current ratings sometimes in the rangeof 1000 to 1400 amps and increasingly greater lengths to supply all ofthe required voltage domains while staying under the maximum allowedcurrent per inch of card edge. These requirements all directly influencethe force required to achieve connection between the power supply andthe system processing unit. For example, a power supply configured tosupply approximately 20 power domains with contact ratings ranging from40 to 150 amps results in a connection force of approximately 110 lbs.

Further, as connector length has increased, difficulty in successfullyengaging the connector has also increased. The increased lengthincreases the potential for angular deflection between the two connectorhalves, and also potentially increases deformation of each connectorhalf. These factors, among others require employment of an accuratemechanism for engaging the connector halves to one another.

BRIEF SUMMARY

The shortcomings of the prior art are overcome and additional advantagesare provided through the provision of a mechanism for electricallyconnecting a first electronic component to a second electroniccomponent. The mechanism includes an actuating member disposed in thefirst electronic component including a first connector half and anactuation screw having a head and a threaded end. The actuation screw islocated in the first electronic component wherein rotation of theactuation screw urges the actuating member in a direction substantiallyperpendicular to an axis of the actuation screw thereby engaging thefirst connector half to a second connector half disposed in the secondelectronic component.

A method for electrically connecting a first electronic component to asecond electronic component includes rotating an actuation screwdisposed in the first electronic component and in operable communicationwith an actuating member disposed in the first electronic component, theactuating member including a first connector half The actuating memberis urged in a direction substantially perpendicular to an axis of theactuation screw by the rotation of the actuation screw and the firstconnector half is engaged to a second connector half disposed in thesecond electronic component.

Additional features and advantages are realized through the techniquesof the present invention. Other embodiments and aspects of the inventionare described in detail herein and are considered a part of the claimedinvention. For a better understanding of the invention with advantagesand features, refer to the description and to the drawings.

TECHNICAL EFFECTS

As a result of the summarized invention, technically we have achieved asolution which provides a mechanism for electrically connecting a firstelectrical component to a second electrical component utilizingmechanical advantage to overcome increasing engagement forces caused bythe utilization of connectors of increasing length and voltage ratings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

The subject matter which is regarded as the invention is particularlypointed out and distinctly claimed in the claims at the conclusion ofthe specification. The foregoing and other objects, features, andadvantages of the invention are apparent from the following detaileddescription taken in conjunction with the accompanying drawings inwhich:

FIG. 1 is a partially exploded view of an embodiment of a direct currentadapter assembly including a connector actuation mechanism;

FIG. 2 is a perspective view on an embodiment of an a connectoractuation mechanism installed on a card assembly of the direct currentadapter of FIG. 1;

FIG. 3 is a partial cross-sectional view of the assembly of FIG. 2;

FIG. 4 is a detail view of an alternative embodiment of the assembly ofFIG. 2;

FIG. 5 is a perspective view of the assembly of FIG. 2 in an engagedposition;

FIG. 6 is an alternative embodiment of a connector actuation mechanism;

FIG. 7 illustrates the mechanism of FIG. 6 disposed in an engagedposition; and

FIG. 8 illustrates an embodiment of a screw drive for the mechanism ofFIG. 6.

The detailed description explains the preferred embodiments of theinvention, together with advantages and features, by way of example withreference to the drawings.

DETAILED DESCRIPTION

Turning now to the drawings in greater detail, it will be seen that inFIG. 1 there is a card assembly 10 that includes at least one DCAconnector 12 disposed along a length of and operably connected to thecard assembly 10. The card assembly 10 is moveably disposed in anelectronic component, for example, a direct current adapter (DCA) 14.The DCA 14 further includes an enclosure which in the embodiment of FIG.1 includes a chassis assembly 18 and a cover 20 assembled thereto. Theenclosure defines a connector window 22 which allows for extension ofthe at least one DCA connector 12 therethrough. The DCA 14 isinstallable into, for example, a server 24 and the at least one DCAconnector 12 is connectable to at least one server connector 26. Aconnection between the DCA connector 12 and the server connector 26 is ablind connection wherein a direction of installation of the DCA 14 intothe server 24 is substantially different from a direction of connectionbetween the DCA connector 12 and the server connector 26. In theembodiment of FIG. 1, DCA 14 is inserted into the server 24 in aninstallation direction 28 and the DCA connector 12 is engaged to theserver connector 26 in a connection direction 30 which is substantiallyperpendicular to the installation direction 28.

Referring now to FIG. 2, an actuation mechanism 32 is illustrated whichis capable of moving the card assembly 10 including the DCA connector 12in the connection direction 30 to engage the DCA connector 12 with theserver connector 26. In the embodiment of the actuation mechanism 32shown in FIG. 2, a guide bar 34 is affixed to the chassis assembly 18 bymechanical fasteners, for example, a plurality of screws 36, or othermeans as shown best in FIG. 1. The chassis assembly 18 is omitted fromFIG. 2 merely to enable illustration of the remaining structure of theactuation mechanism 32. The guide bar 34 of the present embodiment isdisposed substantially perpendicularly to the connection direction 30,but other orientations of the guide bar 34 are contemplated within thepresent scope. At least one driven ramp 38 is affixed to the cardassembly 10, for example, to the DCA connector 12 by one or more screws36 or other means. The embodiment of FIG. 2 includes two driven ramps38, but other quantities of driven ramps 38 may be utilized depending onfactors such as length of the DCA connector 12. Each driven includes adriven ramp edge 40 which is disposed such that it is parallel toneither of the installation direction 28 and the connection direction30. In some embodiments, as shown in FIG. 2, each driven ramp 38 istriangular in shape and each driven ramp edge 40 is substantiallyparallel to each other driven ramp edge 40. Further, as shown in FIG. 5,the individual driven ramps 38 may be joined to each other by a spar 42to integrally connect the individual driven ramps 38 into a singlecomponent.

Referring again to FIG. 2, each driven ramp edge 40 abuts a drive rampedge 44 of a drive ramp 46 which is disposed between the driven ramps 38and the guide bar 34. The drive ramp 46 of the embodiment shown in FIG.2 interfaces with the guide bar 34 and each driven ramp 38 by aninterleaving arrangement. For example, as shown in FIG. 3, the guide bar34 is configured with a main slot 48 extending along a length of theguide bar 34 and a main tab 50 which may extend substantiallyperpendicular to the main slot 48. The drive ramp 46 includes a guideslot 52 extending along a length of the drive ramp 46 which is capableof receiving the main tab 50 and a guide tab 54 which is insertable intothe main slot 48 thus creating an interleaved arrangement between theguide bar 34 and the drive ramp 46 wherein the drive ramp 46 is moveablerelative to the fixed guide bar 34 in a guide direction 56. As shown inFIG. 3, the drive ramp 46 also includes a drive slot 58 receivable of adriven tab 60 of the driven ramp 38, and a drive tab 62 which isinsertable into a driven slot 64 of the driven ramp 38. When the driveramp 46 is assembled to the driven ramp 38, the drive ramp 46 is movablerelative to the driven ramp 38 in a drive direction 66.

In an alternative embodiment shown in FIG. 4, the drive ramp 46 and eachdriven ramp 38 have an interlocking interface. For example, the drivenramp 38 may include an interlocking feature 68 which preventsdisengagement of the driven ramp 38 from the drive ramp 46.

Referring again to FIG. 2, an actuation screw 70 is disposed in thechassis assembly 18 and extends through the chassis assembly 18 via ascrew retention bracket 72. The screw retention bracket 72 maintains theposition of the actuation screw 70 in the chassis assembly 18. Theactuation screw 70 includes a threaded end 74 which extends from thescrew retention bracket 72 into an actuation hole 76 in the drive ramp46. The actuation hole 76 has a threaded configuration complimentary tothe actuation screw 70.

In operation, the DCA 14 is installed into the server 24 by sliding theDCA 14 into the server 24 in the installation direction 28. Theactuation screw 70 is rotated in, for example, a clockwise direction asshown by arrow 78. The rotation of the actuation screw 70 in theactuation hole 76 causes the drive ramp 46 to travel along the guidedirection 56 toward a head 80 of the actuation screw 70. As the driveramp 46 moves along the guide direction 46, each drive ramp edge 44moves along the corresponding driven ramp edge 40, urging the drivenramps 38 and therefore the card assembly 10 in the connection direction30 until the DCA connector 12 fully engages the server connector 26 asshown in FIG. 5.

In some embodiments, low friction coatings or platings may be includedin the guide bar 34, the drive ramp 46, and/or the at least one drivenramp 38, for example, to maximize a mechanical advantage provided by theactuation mechanism 32. The actuation mechanism 32 may be customized by,for example, adjusting a drive direction 66 to met requirements forconnector travel and/or connection force.

An alternative embodiment of a screw-driven actuation mechanism 32 isillustrated in FIG. 6. In this embodiment, the card assembly 10 issecured to a slider plate 82. The card assembly 10 is not shown in thisview so the structure of the mechanism 32 may be fully shown. Aplurality of linkages 84 are each connected at a first end 86 to theslider plate 82 by a mechanical fastener, for example, a rivet 88. Inthe embodiment shown in FIG. 6 four linkages 84 are utilized, but otherquantities of linkages 84 are contemplated within the current scope. Asecond end 90 of each linkage 84 is secured to the chassis assembly 18by a mechanical fastener, for example a link screw 92. The link screws92 allow for relative rotation between each linkage 84 and the chassisassembly 18. Similarly, each rivet 88 allows for relative rotationbetween each linkage 84 and the slider plate 82. The linkages 84, sliderplate 82, chassis assembly 18, and connections therebetween areconfigured such that as the linkages 84 rotate relative to the chassisassembly 18, the slider plate is urged between a rotate, the sliderplate 82 and the card assembly 10 disposed thereon is moved between adisengaged position (shown in FIG. 6) and an engaged position asillustrated in FIG. 7. Moving the card assembly 10 from a disengagedposition to an engaged position thereby engages the DCA connector 12with the server connector 26.

As shown in FIG. 7, a linking arm 94 is secured at a plate end 96 to theslider plate 82 by a mechanical fastener, for example, a link screw 92.As shown in FIG. 8, the linking arm 94 is secured at a nut end 98 to asliding nut 100. The sliding nut 100 is threaded onto the threaded end74 of the actuation screw 70. In this embodiment, a tip 102 of theactuation screw 70 is positioned in a clearance hole 104 of a fixedguide 106 which is fixed to the chassis assembly 18. The actuation screw70 is rotably secured in the clearance hole 104 by one or more snaprings 108 disposed on the actuation screw 70 at either or both ends ofthe clearance hole 104.

When it is desired to connect the DCA connector 12 with the serverconnector 26 in this embodiment, the actuation screw 70 is rotated,causing the sliding nut 100 to proceed away from the head 80 of theactuation screw 70. The motion of the sliding nut 100 causes rotation ofthe linking arm 94 which results in translation of the slider plate 82from the disengaged position to the engaged position, thereby engagingthe DCA connector 12 with the server connector 26. The DCA connector 12may be disengaged from the server connector 26 by rotating the actuationscrew 70 in an opposite direction.

While the preferred embodiment to the invention has been described, itwill be understood that those skilled in the art, both now and in thefuture, may make various improvements and enhancements which fall withinthe scope of the claims which follow. These claims should be construedto maintain the proper protection for the invention first described.

1. A mechanism for electrically connecting a first electronic componentto a second electronic component comprising: an actuation mechanismdisposed in the first electronic component including a first connectorhalf, and an actuation screw having a head and a threaded end, theactuation screw disposed in the first electronic component whereinrotation of the actuation screw urges the actuating mechanism in adirection substantially perpendicular to an axis of the actuation screwthereby engaging the first connector half to a second connector halfdisposed in the second electronic component; wherein the firstelectronic component comprises: a plurality of linkages, each linkagerotably connected at a first end to the actuating member and rotablyconnected at a second end to the first electronic component; a linkingarm rotably connected to the actuating mechanism at a first arm end; asliding nut threaded onto the threaded end of the actuation screw, thesliding nut rotably connected to a nut end of the linking arm whereinrotation of the actuation screw moves the sliding nut away from the headof the actuation screw thereby urging the linking arm to push theactuating mechanism, the actuating mechanism moved in the directionsubstantially perpendicular to the axis of the actuation screw.
 2. Themechanism of claim 1 wherein the plurality of linkages is four linkages.3. The mechanism of claim 1 wherein the first electronic componentincludes a fixed guide having a clearance hole receivable of a tip ofthe actuation screw.
 4. The mechanism of claim 1 wherein the firstelectronic component is a direct current adapter.
 5. The mechanism ofclaim 1 wherein the second electronic component is a server.
 6. A methodfor electrically connecting a first electronic component to a secondelectronic component comprising: rotating an actuation screw disposed inthe first electronic component and in operable communication with anactuating mechanism disposed in the first electronic component, theactuating mechanism including a first connector half; urging theactuating mechanism in a direction substantially perpendicular to anaxis of the threaded fastener by the rotation of the actuation screw;and engaging the first connector half to a second connector halfdisposed in the second electronic component; wherein urging theactuating mechanism comprises: moving a sliding nut threaded onto theactuation screw away from away from a head of the actuation screw alongan axis of the actuation screw by the rotation of the actuation screw;rotating a linking arm by the motion of the sliding nut, the linking armoperably connected to both the sliding nut and the actuating mechanism;urging the actuating mechanism toward an engaged position via therotation of the linking arm; and positioning the actuating mechanism inthe engaged position via the rotation of a plurality of linkages, eachlinkage rotably connected at a first end to the actuating mechanism androtably connected at a second end to the first electronic component. 7.The method of claim 6 wherein the plurality of linkages is fourlinkages.